Alloy Names (as per RoHS specifications) | |
---|---|
IS/ISO | CuSn4 |
DIN CEN/TS 13388 | CW450K |
UNS | C51100 |
JIS | C51100 |
Chemical Composition | Weight percentage |
---|---|
Tin [Sn] | 3.5 % to 4.5% |
Phosphorus [P] | 0.03% to 0.35% |
Zinc [Zn] | 0.30% Maximum |
Lead [Pb] | 0.05 % Maximum |
Copper [Cu] | Remainder % |
Characterists |
---|
|
Main Applications |
---|
Electrical : Contact Springs,Relais Springs,Terminals,Switch Parts Fuse Clips,Electronic connectors. Fasteners : Lock Washers,Fasteners. Industrial : Textile Machinery,perforated Sheets,Springs,Sleeve Bushing,Clutch Disks. General : Stamped parts,Connectors,Contact Springs,spring Elements,Ultra high strength spring elements,Fixed contacts. |
Properties
Density | 8.85 | g/cm3 |
Thermal expansion coefficient - 191..16 | 17.8 | 10-6/K |
0..300°C | 18.1 | 10-6/K |
Specific heat capacity | 0.377 | J/(g·K) |
Thermal Conductivity | 100 | W/(m·K) |
Electrical Conductivity (1 MS/m = 1 m/(O mm²) | ≥ 11 | MS/m |
Electrical Conductivity (IACS) | ≥ 19 | % |
Thermal coefficient of electrical resistance (0..200 C) | 0.1 | 10-3/K |
Modulus of elasticity (1 Gpa = 1 kN/mm²) cold formed | 110 | Gpa |
120 | Gpa |
Temper | Tensile Strength | Yield Strength | Elongation Minimum | Hardness HV |
Rm | Rp0.2 | A50mm | ||
MPa(N/mm2) | MPa(N/mm2) | % | ||
O (Soft) | 295 Min | ≤ 190* | 40 Min | 80 Max |
HA (Quater Hard) | 340 Min | ≥ 320 | 30 Min | 100 Min |
HB (Half Hard) | 430 Min | ≥ 440 | 8 Min | 150 Min |
HD (Hard) | 510 Min | ≥ 480 | 4 Min | 175 Min |
HE (Extra Hard) | 620 Min | ≥ 560 | 2 Min | 180 Min |
HS (Spring Hard) | 650 Min | ≥ 620 | 200 Min |